解题方法
1 . 已知
均为正实数.
(1)求证:
,
(2)若一个直角
的两条直角边分别为
,斜边
,求直角
周长
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cb2e31608320e989afeeed9a7a8482d.png)
(2)若一个直角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6de1d395e6c48c0676a1488a299479d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
您最近一年使用:0次
2023-10-13更新
|
112次组卷
|
3卷引用:河北省卓越联盟2023-2024学年高一上学期10月月考数学试题
名校
解题方法
2 . 已知函数
.
(1)求
的最小值,并指出此时
的取值范围;
(2)证明:
等价于
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/512a30ae772c9ad858e0c1de041f7707.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2146ceef447fc62775f67a088a39a4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33ea38a20f3b5aca37b6192237252119.png)
您最近一年使用:0次
2023-12-27更新
|
196次组卷
|
5卷引用:陕西省西安市部分学校2024届高三上学期12月联考数学(文)试题
解题方法
3 . 已知代数式
和
.
(1)若
,求不等式
的解集;
(2)若
,证明
中至少有一个数不小于
;
(3)若
,不等式
对任意实数
恒成立,试确定实数
满足的条件.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fe56a82278b144101fda1fa2cf59703.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c0a82f3b0b621e05cf6e77cddb0628e.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3278317e48e20b5aae4912d0cfdce545.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ae0a7e5eeda987af2130d0ba69bf1.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da67075d5f20954afe0232112e159ac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d33f8ea9598f0d9134721b35565d28e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/533a7b702ada1dd80123e4041271d521.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5d5b84e3d3af2112a4f066c2a9f1387.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
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4 . (1)已知
克糖水中含有
克糖(
),再添加
克糖(
)(假设全部溶解),糖水变甜了.请将这一事实表示为一个不等式,不必证明.利用此结论证明:若
为三角形的三边长,则
.
(2)超市里面提供两种糖:白糖每千克
元,红糖每千克
元
.小东买了相同质量的两种糖,小华买了相同价钱的两种糖.请问谁买的糖的平均价格比较高?请证明你的结论.(物品的平均价格
物品的总价钱
物品的总质量)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d100c22435a23e017cfe6f535379d3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01721633154e61aa2650bf0b8b10e666.png)
(2)超市里面提供两种糖:白糖每千克
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8be646cd52d7f2f1714e7542e75810f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adad9633b73dfbbb3d84b4f15979e99e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24f3fa74d328be03b864d77912107cd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09052719a6d55df23d74d8e3956257ea.png)
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名校
5 . 已知函数
,
且
.
(1)若函数
的最小值为
,试证明点
在定直线上;
(2)若
,
时,不等式
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4490503c29b1743ca34b05e900d8730.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73254f32b6da29ecc32df2e9f87a4c97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33ecda7bfb0a2043306bf7707a136ad0.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4562f3225c98cf5cb11b47d98c9cc9c3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3c442579603164f3fc19458677d307.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f7dbb416ec1ff1984a724a4f48bf692.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6213c81ca727adbcdda8cbdbe10c30a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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名校
解题方法
6 . 对于空间向量
,定义
,其中
表示x,y,z这三个数的最大值.
(1)已知
,
.
①直接写出
和
(用含
的式子表示);
②当
,写出
的最小值及此时
的值;
(2)设
,
,求证:
;
(3)在空间直角坐标系
中,
,
,
,点Q是
内部的动点,直接写出
的最小值(无需解答过程).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b303ef66609858e8ab234b6dabccba4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e382f70d741ee01c165391ce980155d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a4461408813c1476a8a8073c83b8989.png)
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23056c429159c0198f865ff11972d8df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e17d2355419564f6d9737295412b58c.png)
①直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9873960d64934875139754efbdfe951d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13af5f843689a63bc176c2d2171b6a1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53168695826b0a33a23067b76173c7e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/780ef5119f58f853ce9dd2b9176ffdde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/778ae4468d857c229073875e0ee0ce31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6772fa3937b97d9ec3aec1ea2ea143b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95086cc97ef93f5166489b3bc47e1911.png)
(3)在空间直角坐标系
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5e336d6ca2cae3d6e6c3810d7e521a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b32ab04dd852329d5918b177c199eee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee736aec4313d04a5921ed7e5800b3b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d04a00e46c1ffb335f73506041c66dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/084fc7655647b596d07e80269d086e5a.png)
您最近一年使用:0次
2022高一·全国·专题练习
名校
7 . 求证:
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/840ab5202c0dd51fb0d9aa14a500fd45.png)
(2)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/840ab5202c0dd51fb0d9aa14a500fd45.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2491417bf91398e74a0680b031cabb6e.png)
您最近一年使用:0次
解题方法
8 . 已知
,且
.
(1)求
的最大值与最小值;
(2)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2684b72f9f38f5046c8ecd4280b7b14b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/561d66cbf4d5d18ede7ef833ee1a44b2.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9aa1d14b8d520a1c16211d6fbdf8089.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7aa92b2a3c570b1c4229b585c3ac212.png)
您最近一年使用:0次
解题方法
9 . 已知关于
的不等式
对任意实数
恒成立.
(1)求实数
的取值范围;
(2)记实数
的最小值为
,若
均为正实数,且
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9800cf038376bb0c550ea354af615924.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)记实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f781b9233eccd93276a9c333c604a4e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea10079b6346e90ba3818727244ce44a.png)
您最近一年使用:0次
2023-05-16更新
|
284次组卷
|
2卷引用:贵州省贵阳市2023届高三3+3+3高考备考诊断性联考(三)数学(文)试题
名校
解题方法
10 . 设函数
.
(1)解不等式
;
(2)令
的最小值为
,正数
满足
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2790f3349fae2119070e9a512717aa9e.png)
(1)解不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/155834bf3412ebac9896c0cce9e2cb31.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81ccb77ba53e986204cd158abb87bcbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4336688b5b9fb6d91400401756cc45e8.png)
您最近一年使用:0次
2024-01-03更新
|
898次组卷
|
11卷引用:四川省雅安市2024届高三一模数学(理)试题